CHAPTER 21 — Recompression Therapy 21-39 Figure 21-6.  Treatment of Symptom Recurrence.   Diagnosis: Recurrence During Treatment Diagnosis: Recurrence Following Treatment No No No No Yes Yes Yes Yes Yes No Yes No No Treatment of Symptom Recurrence Treat according to Fig. 21-5 Diver on oxygen compress to 60 feet Symptom onset 60 feet or deeper? Deeper recompression needed? (Note 1) Continue and/or extend Current Table Yes Complete three 20 min. oxygen breathing periods at 60 feet Symptoms relieved? Deeper recompression needed? Compress to depth of relief (165 feet maximum) with patient off O2 Remain at depth :30 min. on air or treatment gas if available Decompress to 60 feet on Table 4 Remain at 60 feet at least 12 hours (Note 1 and Note 3) Enter Treatment Table 6A at treatment depth and decompress accordingly Decompress on Table 6 Extended Decompress on Table 7 (Note 1) Complete Table 4 (Note 1) Life threatening symptoms or more time needed at 60 feet? (Note 2) Decompress on Table 6 Symptoms still present & more time needed at 60 feet? (Note 1) More time needed at treatment depth? (Note 1) Recurrence During Treatment Recurrence Following Treatment NOTES: 1. A Diving Medical Officer shall be consulted before committing to a Treatment Table 4 or 7. 2. Treatment Table 6 may be extended up to two additional oxygen breathing periods at 30 and/or 60 feet. 3. Additional time may be required according to paragraph 21-5.4.5.4.